I just finished the solo levels, and the only word I can say is "wow"!

I must confess I never thought an open source project based on marathon would reach a quality level comparable to the original three ones that I absolutely love... but you made it! A compelling story with enough twists and worth reading terminals with influence inside the game; a wery well designed, neither too short nor too long, beautiful levels with aleph one-specific features that made me blink, astounded; nice graphics and textures; more weapons than I can remember in any FPS that I've played; hours and hours of fun and almost addiction...

So, in a word, wow!

Cheers,
Miguel Santander